You will report the Algebra 1 grade on the application but it will not be considered in their calculation. Only 9-11th grades. However, if you have taken more the minimum Math classes you will get bonus points.

As @Gumbymom‌ said, more math equals more bonus. In fact Poly sees math as so important that the maximum math bonus, 500 points, is 10% of the maximum admissions algorithm score, 5000. If you're taking Calc AB or BC this year, you should get the max bonus.